Reinforced rubber article



ug. 24, 1937. C, Q HARRAH 2,090,794k

REINFORCED RUBBERARTIGLE Filed July. 25, 1934 2 Sheets-Sheet 1'47070/07070/0/ig4g/ l o K @Wxyswx ATTORNEY.

ug 24, 1937. c. c. HARRAH REINFORCEQ RUBBER ARTICLE Filed July 23, 19342 Sheets-Sheet 2 @nos osais aoc l INVENTOR, Q ,4 f7-0N. C HARRAHATTQRNEX 20 bedded in the rubber and with the pressures of The novelhose shown in Figures 1-3 includes mira stares raient 'ori-ica aosaieinElNiFoRCED RUBBER ARTICLE Clayton C. Harrah, Niles, Mich., as signor toNational Standard Company, Niles, Mich., a corporation of MichiganApplication July 23, 1934, Serial No, 736,527 Claims. (CL 138-56) Thisinvention relates to the manufacture of Figure 4 is a section throughthis braid, on the rubber articlesv such as hose, and especially to linelll-t of Figure 3; their reinforcement by means suchas very heavy Figure5 is a similar plan view of another braid wires. f y having reinforcingwires enmeshed therein some 5 It has always been diicult to secure`reinforcedistance from the edges; A 5 ment by means of such heavy'wires,as the wires Figure 6 is a section through this braid on the tend to cutthe rubber and to become `loosened in line 6 -6 of Figure 5; time as therubber works back and for-th over Figure 7 is a view similar to Figure 1but showthem. At the same time such reinforcing means ing the-braid ofFigures 5 and 6;

10. has many advantages, if itv can be kept from Figure 8 is a .viewsimilar to Figures 1 and '7 l0 cutting and from working loose. Forexample, but having a single reinforcing layer formed of ahosereinforced in this manner resists cola tubular braid having a heavy wireenmeshed lapsing andcrushing strains (e. g. when used therein andhelically carried thereby;

for vacuum lines) as well as'bursting strains. Figure 9 is a section onthe line -Q of Fig- An object of the present invention is to secure ure8; 4 15 the advantages of such heavy and sti reinforc- Figure 10 is asection through the tubular ing wires,v by providing means such as abraid braid, 0n theline Of Figure 8; and of small flexible wirescarrying and enmeshing Figures 1.1; and 12 show the reinforcing wiresAthe heavy wire or wires, the whole 'being emcarried by a woven tape.

a kconsiderable area of the hose body acting on a central tubular rubberportion 2d, over which each Wire, are Wound helically-layers 22 ofcanvas or other Preferably the wires of the braidloop back and fabricreinforcement. The drawings show two forth about the heavy wire, to flock it rmly such layers, wound in opposite directions.

thereto throughout its length. The braid may Over the fabric layer iswound the metallic be wound helically about the hose axis,preferreinforcement. As-shoWn in Figure this C0111- .ably between two ofthe layers of the usual fabprises two layers, wound helically inOpposite dric, and I prefer to wind two such braids, one rections so asto break joints, of braid 2li of exn' on top of the other, in oppositedirections to ible and relatively light wires, having enmeshed break thejoints, so that there is no tendency to therein along the opposite edgesrelatively stiif 30 break the hose down opposite the joints between andheavy wires 2t. l l successive convolutions. K The interwoven Wires ofthe braid ad ioop ln some cases sufficient strength can be secured overthe heavy wires 2G at the edges of the braid, by using a tubular braidto carry the enmeshed where the lighter wires turn back on themselvesheavy wire, which in this case is preferably wound to continue backacross the braid; These lighter helically about the axis of the braid.'wires are braided, by being alternately under- Many oi" the advantagesof the invention can passed and overpassed to form' a braided fabric, besecured by enmeshing the heavy reinforcing and all of them preferablyloop about the heavy wires in smaller wires which are woven into a wireswhen they reach the edge of the braid.

oA tape. If desired, additional fabric layers may next d0 'The abovexandother objects and features of be added, two layers 28 of canvas woundhel-- theV invention, including various novel combiiealiy in oppositedirections being shown. A nations and arrangements, and desirableparticuunal layer :it of rubber is formed about the whole. larconstructions, will be apparent from the fol- The hose so built up iscured in mensual man..

lowing description of the illustrative embodlnen The rubber from layers2@ and 3@ not 45 ments shown 1x1-the accompanying drawings' in onlypermeates the fabric 2?. and 28; it also which: ows through the meshesof the braid 2d and Figure 1 is a side elevation oi a reinforced' hoseembodying the invention broken away to about the heavy reinforcing wires2e so that they are completely imbedded therein.

Shigilezvlguegshrough the hose on the It will be seen that the braid2li, or its equivaline-Z-Z 'of Figure i; lent, transmits to the wires 26the pressures Figure 3 is an enlarged pian view of one 'form acting onconsiderable areas of the hose body,

of braid, having reinforcing wires enmeshed 110i Only Obviatine anytendency 0f the Wires therein atithe edges; 26 to cutthe rubber, butalso insuring that'the 55 rubber will not tend to push through betweenthe convolutons of the reinforcing wire.

The braid 24 has a high tensile strength, and aids the heavy wiresfinreinforcing the hose againstv internal bursting pressures. The heavywires, however, are of the greatest utility in reinforcing the hoseagainst collapsing or crushing pressures, as when the hose is used for avacuum line.

In the arrangement of Figures 5-7, two braids |24 are oppositely woundas described above, but the reinforcing wires in each braid are tworelatively heavy and stiff parallel wires |26 spaced inwardly from theedges'of. the braid.

In Figures 8-10, the h'ose is reinforced with 9. tubular wire braid 224,arranged coaxially of the hose between the fabric layers, and reinforcedby one or more helically-arranged heavy wires 226. The wire 226 is notlooped over by every strand of the braid, but lskips enough of them togive it sufcient inclination to secure the desired helical arrangement.YY

Inall of the above-described constructions, the wire of the braid may beround or flat or oi any other desired shape in cross-section.

For some purposes, many advantages of the invention may be obtained byenmeshing heavy reinforcing wires 426 at the edges of a tape woven withlongitudinal smaller wires 424 held by a cross-wire 428 woventhere-through. In the construction shown in Figure 12 the heavyreinforcing wires 526 are arranged about one-third of the way inwardfrom the edges of a tape woven-from longitudinal wires 524 and cross-Wires. The term tape as used herein' is intended to include such wovenconstructions as well as a braided tape, and other. constructions inwhich small flexible' wires are formed into a sheet having intersticesenmeshing a heavy and substantially straight reinforcing wire.

While several illustrative embodiments have been described in detail, itis not my i'ntentlon to limit the scope of the invention to tll'oseparticular embodiments, or otherwisethan bythe terms of the appendedclaims.

1. A hose comprising a tubular body of rubber material having a tubularmetallic layer of flexible wires embedded therein, and a stiff and heavyreinforcing wire enmeshed in and carried by said layer and embeddedtherewith in the rubber material and reinforcing the againstexpansiondue to internal pressure and against collapsing due to internalsuction, said layer transmitting to said heavy wire the forces acting onconsiderable areas -ible wires embedded therein,

hose body both of the hosebody.

2. A hose comprising a tubular body of rubber material having a tubularmetallic layer comprising two tapes of flexible wires wound in oppositehelices'about the body of rubber material and embedded therein, andstiff and heavy reinforcing wires enmeshed in and carried by said tapesand embedded therewith in the rubber materialand reinforcing the hosebody both against expansion due to internal pressure and againstcollapsing due to internal suction, said layer transmitting to saidheavy wires the forces acting on considerable areas of the hose body.

3. A hose comprising a tubular body of. rubber material having a tubularmetallic layer of flexand a stii and heavy reinforcing wire enmeshed inand carried by said layer and embedded therewith in the rubber materialand reinforcing the hose body both againstexpansi'on due to internalpressure andl against collapsing due to internal suction, said layertransmitting to said heavy wire the forces acting on considerable areasof the hose body, and said layer being formed of tape comprising aplurality of said flexible wires interwoven together and having thereinforcing wire interwoven along the edge thereof.

4. A hose comprising a tubular body of rubber material having a tubularmetallic layer of flexible wires embedded therein, and a stiff andheavyreinforcing wire enmeshed in and carried by said layer and embeddedtherewith in the rubber material and reinforcing the hose body. bothagainst expansion due to internal pressure and against collapsing due tointernal suction, said layer transmitting to said heavy wire the forcesacting on considerable areas of the hose body, and said layer beingformed of. tape comprising a plurality of said flexible wires interwoventogether and having two strands of the reinforcing wire' interwoventherewith parallel to, but spaced from, each edge thereof.

5. A hose comprising a tubular body of rubber material having a tubularmetallic layer of flexible wires embedded therein, and a stiff and heavyreinforcing wire enmeshed in and carried by said layer and embeddedtherewith in the rubber material and reinforcing the hose body bothagainst expansion due to internal pressure and l against collapsing dueto -`internal suction, said layer transmitting to said heavy wire theforces acting on considerable areas said' layer being formed of aplurality of said ilexible wires braided in the form of a tube andhaving the reinforcing wire interwoven therewith in the form of a helixabout the tube.`

C. C. HARRAH.

of the hose body,

